Protonation constants of valine, serine, and beta-alanine in artificial seawater at 25 degrees C

Fiol S; Vilarino T; Herrero R; de Vicente MES; Arce F

Journal of Chemical and Engineering Data, Vol.43, No.3, 393-395, 1998

Fiol S, Vilarino T, Herrero R, de Vicente MES, Arce F

The protonation constants of some amino acids commonly found in natural waters, namely valine, (CH3)(2)CHCH2CH(NH2)COOH; serine, OHCH2CH(NH2)COOH; and beta-alanine, NH2CH2CH2COOH, have been studied at different ionic strength of artificial seawater and at 25 degrees C by potentiometry with a commercial glass electrode. The results have been interpreted by the Fitter interaction model.

Keywords:AMINO-ACIDS;STABILITY-CONSTANTS;METAL-COMPLEXES;THERMODYNAMICS;PITZER;TRIETHANOLAMINE;ELECTROLYTES;DISSOCIATION;0-DEGREES-C;SALINITIES